The diagram shows a section through part of a healthy human. Which row in the table shows the correct secretions from P, Q and R?

Answer:

1) A

P is the gall bladder which secretes only bile.

Q is the stomach. In the stomach, proteins are broken down. So proteases must be secreted. Also, hydrochloric acid is also secreted. This means that it has a high hydrogen ion (H⁺) concentration.

R is the pancreas which secretes all of the three enzymes: protease, lipase and amylase. Also, the pancreas secretes insulin to control blood glucose concentrations.

So A is the answer